Ancient indus sculptures were

a. extremely large and usually made out of clay or sandstone.
b. created to show people how buddha came to become deity.
c. contained inscriptions along the top edge that we cannot understand today.
d. always carved into the sides of mountains and in the walls of caves in the valley.

C. Contained inscriptions along the top edge that we cannot understand today.

Explanation:

The history of the Indian art and sculpture traces its origin and source back to the Indus valley civilization. The Indus Valley civilization blossomed in northwestern regions of South Asia [what is now Modern-day Northwestern India and Pakistan] between 2500 B.C - 1700 B.C. It was the most widespread of the three early civilisations of the Near East and South Asia; its region stretches from ome part of Afghanistan, through much of Pakistan and India

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it was a act of seld fesnse more over it was a peace treaty between the fogein contunries.